Solar explained to clever people by people who are not trying to be clever

Solar Panels in PA44 (Argyll and Bute)

See if solar pays off for you in Argyll and Bute — price, savings and payback in under a minute (official UK data).

Solar Calculator

Change the settings below to see how costs and savings work for your situation.

System Size

Roof Direction

Battery Storage

Export Value

Your Numbers

Break-even
14.0 years
After this, it's pure profit
Upfront Cost
£10,173
What you pay to get started
Annual Benefit
£729
What you save every year
Profit Over 25 Years
£8,040
After paying itself off, you're this much ahead

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How we calculate this

Solar generation: Based on typical south-facing roof at 35° angle. We account for weather, dirt, and system losses (14%).

How much you'll use directly:

  • Without battery: You'll use about 40% of what you generate. The rest gets sold back to the grid.
  • With 5 kWh battery: You'll use about 70% (battery stores extra for evening use).
  • With 10 kWh battery: You'll use about 75% (more storage means less exported).
  • Panel-only payback: Bigger systems don’t shorten payback—cost and savings rise together per kW.
  • Battery & payback: Batteries raise self-use and cut bills, but added hardware cost often lengthens break-even at typical UK rates.
  • When a battery can still make sense:
    • Evening-heavy usage patterns
    • Time-of-use tariffs / cheap night rates
    • Low export rate vs. high unit rate
    • Heat pump or EV charging synergy
    • Optional backup/resilience (system-dependent)
    • Lower evening-hour CO₂ vs. grid

Costs: Battery prices are typically £700 per kWh. Export tariffs vary by supplier (usually 5–15p per kWh).

Grid connection: Systems up to about 3.7 kW typically need just a notification (G98). Larger systems may need permission (G99).

These are typical values based on average usage patterns. Your actual results will vary based on your roof, shading, and how you use electricity.

Your area in context

Read the full story

A typical roof here lands around 5.0 kW, with most eligible homes comfortably fitting within 3–6 kW. Each kilowatt of panels produces roughly 866 kWh per year on a south-facing roof. We value self-used electricity at 27.1p and exported surplus at a baseline 10p via SEG. Use the calculator above for your exact tariff.

Unit rate
27.1p/kWh
Standing charge
61.0p/day
Sunshine yield (south)
866 kWh/kW
Export price (baseline)
10p/kWh

Browse the scenarios below. Each battery size has its own expand — open the one that matches your plan (or just explore). For each system size (2–8 kW) we show annual output, how much you use directly, what gets exported, annual benefit, upfront cost, break-even, and a 20-year net. Negative numbers are possible — that’s the honest trade-off when adding more battery than your usage profile justifies.

No battery 5 kW example → Annual benefit: £729, Upfront: £10,173, Break-even: 14.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1732 kWh 693 kWh 1039 kWh £187 £104 £291 £4,069 14.0 yrs £1,759
3 kW 2598 kWh 1039 kWh 1559 kWh £281 £156 £437 £6,104 14.0 yrs £2,639
4 kW 3464 kWh 1386 kWh 2078 kWh £375 £208 £583 £8,138 14.0 yrs £3,518
5 kW 4330 kWh 1732 kWh 2598 kWh £469 £260 £729 £10,173 14.0 yrs £4,398
6 kW 5196 kWh 2078 kWh 3118 kWh £562 £312 £874 £12,207 14.0 yrs £5,277
7 kW 6062 kWh 2425 kWh 3637 kWh £656 £364 £1,020 £14,242 14.0 yrs £6,157
8 kW 6928 kWh 2771 kWh 4157 kWh £750 £416 £1,166 £16,276 14.0 yrs £7,036

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

3 kWh battery 5 kW example → Annual benefit: £876, Upfront: £12,273, Break-even: 14.0 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1732 kWh 1039 kWh 693 kWh £281 £69 £351 £6,169 17.6 yrs £841
3 kW 2598 kWh 1559 kWh 1039 kWh £422 £104 £526 £8,204 15.6 yrs £2,312
4 kW 3464 kWh 2078 kWh 1386 kWh £562 £139 £701 £10,238 14.6 yrs £3,782
5 kW 4330 kWh 2598 kWh 1732 kWh £703 £173 £876 £12,273 14.0 yrs £5,253
6 kW 5196 kWh 3118 kWh 2078 kWh £844 £208 £1,052 £14,307 13.6 yrs £6,723
7 kW 6062 kWh 3637 kWh 2425 kWh £984 £242 £1,227 £16,342 13.3 yrs £8,194
8 kW 6928 kWh 4157 kWh 2771 kWh £1,125 £277 £1,402 £18,376 13.1 yrs £9,664

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

5 kWh battery 5 kW example → Annual benefit: £950, Upfront: £13,673, Break-even: 14.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1732 kWh 1212 kWh 520 kWh £328 £52 £380 £7,569 19.9 yrs £32
3 kW 2598 kWh 1819 kWh 779 kWh £492 £78 £570 £9,604 16.8 yrs £1,798
4 kW 3464 kWh 2425 kWh 1039 kWh £656 £104 £760 £11,638 15.3 yrs £3,564
5 kW 4330 kWh 3031 kWh 1299 kWh £820 £130 £950 £13,673 14.4 yrs £5,330
6 kW 5196 kWh 3637 kWh 1559 kWh £984 £156 £1,140 £15,707 13.8 yrs £7,096
7 kW 6062 kWh 4244 kWh 1819 kWh £1,148 £182 £1,330 £17,742 13.3 yrs £8,862
8 kW 6928 kWh 4850 kWh 2078 kWh £1,312 £208 £1,520 £19,776 13.0 yrs £10,628

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

7.5 kWh battery 5 kW example → Annual benefit: £972, Upfront: £15,423, Break-even: 15.9 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1732 kWh 1264 kWh 468 kWh £342 £47 £389 £9,319 24.0 yrs £-1,541
3 kW 2598 kWh 1897 kWh 701 kWh £513 £70 £583 £11,354 19.5 yrs £314
4 kW 3464 kWh 2529 kWh 935 kWh £684 £94 £778 £13,388 17.2 yrs £2,169
5 kW 4330 kWh 3161 kWh 1169 kWh £855 £117 £972 £15,423 15.9 yrs £4,023
6 kW 5196 kWh 3793 kWh 1403 kWh £1,026 £140 £1,167 £17,457 15.0 yrs £5,878
7 kW 6062 kWh 4425 kWh 1637 kWh £1,198 £164 £1,361 £19,492 14.3 yrs £7,733
8 kW 6928 kWh 5058 kWh 1871 kWh £1,369 £187 £1,556 £21,526 13.8 yrs £9,587

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

10 kWh battery 5 kW example → Annual benefit: £987, Upfront: £17,173, Break-even: 17.4 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1732 kWh 1299 kWh 433 kWh £352 £43 £395 £11,069 28.0 yrs £-3,172
3 kW 2598 kWh 1949 kWh 650 kWh £527 £65 £592 £13,104 22.1 yrs £-1,259
4 kW 3464 kWh 2598 kWh 866 kWh £703 £87 £790 £15,138 19.2 yrs £655
5 kW 4330 kWh 3248 kWh 1083 kWh £879 £108 £987 £17,173 17.4 yrs £2,569
6 kW 5196 kWh 3897 kWh 1299 kWh £1,055 £130 £1,184 £19,207 16.2 yrs £4,483
7 kW 6062 kWh 4547 kWh 1516 kWh £1,230 £152 £1,382 £21,242 15.4 yrs £6,396
8 kW 6928 kWh 5196 kWh 1732 kWh £1,406 £173 £1,579 £23,276 14.7 yrs £8,310

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

13.5 kWh battery 5 kW example → Annual benefit: £1,002, Upfront: £19,623, Break-even: 19.6 yrs
System Annual output Self-use Exported Bill saving Export income Annual benefit Upfront cost Break-even 20-year net
2 kW 1732 kWh 1334 kWh 398 kWh £361 £40 £401 £13,519 33.7 yrs £-5,504
3 kW 2598 kWh 2001 kWh 598 kWh £541 £60 £601 £15,554 25.9 yrs £-3,531
4 kW 3464 kWh 2667 kWh 797 kWh £722 £80 £801 £17,588 21.9 yrs £-1,559
5 kW 4330 kWh 3334 kWh 996 kWh £902 £100 £1,002 £19,623 19.6 yrs £414
6 kW 5196 kWh 4001 kWh 1195 kWh £1,083 £120 £1,202 £21,657 18.0 yrs £2,387
7 kW 6062 kWh 4668 kWh 1394 kWh £1,263 £139 £1,403 £23,692 16.9 yrs £4,360
8 kW 6928 kWh 5335 kWh 1594 kWh £1,444 £159 £1,603 £25,726 16.0 yrs £6,333

Assumptions: south-facing, sensible tilt; self-use shares from site rules; export at 10p baseline. Costs: panels £/kW = 2,035, battery £/kWh = 700.

Figures are illustrative and use the same method as the calculator above. For exact results, adjust your roof direction, tariff, and usage in the calculator.

Your Area at a Glance

Your Electricity Rate
27.06p/kWh
Daily Fixed Charge
61.00p/day
Local Sunshine
866kWh/kW
A 1 kW system generates ~866 kWh per year. A typical home uses ~2,700 kWh per year.
Typical System Size
5.0kW
For houses & bungalows in this area

Local Property Data

Property Types

No EPC data available for this outcode

Coverage

Argyll and Bute (100%)

Areas Covered

Kintyre and the Islands

Data Sources & Assumptions

Solar yield: PVGIS (EU Joint Research Centre), January 2025 data

Electricity rates: Ofgem price cap, Q4 2025

Installation costs: MCS certified installer data, March 2025

Property data: EPC open data (Open Government Licence), aggregated

All estimates are typical values. Actual results vary based on your specific situation, roof characteristics, and usage patterns.